Recursive Construction of 16-QAM Super-Golay codes for OFDM systems
|
|
- Coral Rogers
- 5 years ago
- Views:
Transcription
1 Recursive Construction of 16-QAM Super-Golay codes for OFDM systems Masoud Olfat and K. J. Ray Liu Dept. of Electrical and Computer Engineering Univ. of Maryland, College Park, MD 074 Abstract In this paper, the Peak to mean Envelope Power (PMEPR) of the OFDM codes generated from an 16-QAM constellation is discussed. Maintaining the same level of error correction properties, these codes achieve higher information rate. A new set of 16-QAM Golay sequences having PMEPR bounded up to 3dB is defined. Many recursive structures are found to generate Super Golay sequences. The recursive algorithm is started by a generalized realization of an 16-QAM sequence as a weighted sum of two QPSK sequences. The coding rate and information rate of the generated code is compared to similar works. I. INTRODUCTION Orthogonal Frequency Division Modulation (OFDM) is a parallel data transmission scheme that has recently attracted lots of interest to combat the effect of frequency selective channels in wideband wireless communications. One of the major hurdles to the widespread use of OFDM is the high Peak to Average Power Ratio(PAPR) of OFDM signals [1]. Usually the transmitters are constrained to a limited peak power. This in turn reduces the average power allowed under OFDM relative to that under single carrier modulation schemes. In addition, to prevent the spectral growth of the OFDM in the form of intermodulation among subcarriers, the transmitter amplifier must operate in a linear region, otherwise, the mobile battery lifetime is reduced. Many approaches have been proposed to overcome this barrier. The conventional solution to this problem is to use a linear amplifier or to back-off the operating point of nonlinear amplifier, both result in a severe efficiency penalty. Another solution presented in [] is to simply clip the signal before amplification. This approach causes performance degradation. Another attractive idea was using block coding across the subcarriers and selecting the codewords that minimize or reduce PAPR [3] and [4]. This scheme requires an exhaustive search, and does not address error correction. In one of the most recent and efficient works done in this area, Golay Complementary Sequences (GCS) [5] are used as codewords to control the modulation of carrier information resulting in OFDM signals with PAPR at most. Davis and Jedwab [6] presented a magnificent work to obtain a large set of length m binary Golay Complementary Pairs (GCP) from certain second order cosets of the first order Reed-Muller [7] codes. They combined block coding schemes (with all of its properties like efficient encoding and decoding and error correction capabilities) with the use of GCS (with their attractive power control properties). They also went one step further and found h -ary GCP from cosets of an appropriate generalization of the Reed-Muller codes. However, Tarokh and Paterson [8] performed a theoretical analysis for a general coding scheme, having a constellation with equal energy symbols. They found a trade-off between the PAPR, the data rate and the minimum distance of the code. In other words, given the data rate and minimum distance, they found a lower bound for the PAPR that is increased with increasing data rate. In this paper we will look at the general problem of PAPR reduction in multicarrier systems and specifically try to overcome the limitation on PAPR reduction imposed by coding rate [8]. Here, we relax the assumption of having an equal energy constellation and use QAM for modulation. We define a new version of Golay Complementary Sequences to support these codes. The scheme presented in this paper uses a recursive procedure to build the Super Golay (SGolay) 16-QAM sequences. We generalize the recursive schemes for the case of binary Golay sequences introduced in [5]. Using M-QAM modulation allows a better error correcting capabilities over M-PSK. Tarokh and Chong in [9] designed a construction method for low PAPR 16-QAM codes that uses the Jedwab s construction for QPSK Golay sequences [6]. The coding rate achieved by this construction is low (about 3% for 56 subchannels). It should be pointed out that their constructions does not guarantee an upper bound of 3dB for the OFDM PAPR. If they want the PAPR to be bounded up to 3dB, their coding rate will be cut in half. Tarokh and Rößing, in a related work [10], designed another construction for 16-QAM low PAPR codes. In this work a QAM symbol is represented as a weighted sum of two QPSK symbols /03/$ IEEE 3387
2 The constructed sequences are not Golay, but their PAPR is bounded up to 3.6 (=5.6dB), and the coding rate is twice as the rate for Golay QPSK codes found in [6]. For example for N = 56 it results in a rate of 9.7% while the PAPR is guaranteed to be bounded up to 3.6 (5.6dB). The remainder of this paper is organized as follows. In Section II, we will describe the motivation of the research problem. Section III outlines a proposed structure to achieve low PAPR for a general constellation. In Section IV a seed for our recursive procedure is introduced. In Section V we present some simulation results and compare our construction with some existing works and finally Section VI concludes the paper. II. EQUAL-ENERGY GOLAY CODES Channel coding is a mean to perform the PAPR reduction and some error correction for OFDM systems simultaneously. If x is an N-valued complex sequence applied to IFFT block in an OFDM transmitter with frequency separation f, the instantaneous envelope power of the OFDM signal is p x (t) = x i x u exp[jπ(i u) ft]. (1) u=0 Definition 1: The Cross-Correlation of two N- valued complex sequences x and y with replacement 0 l N 1 is defined as C l (x, y) = x i y i+l, and C l (x, y) =(C l (y, x)). Definition : The Auto-Correlation of an N- valued complex codeword x with replacement 1 N l N 1 is A l (x) =C l (x, x) or A l (x) = x i x i+l. Using these definitions, the instantaneous envelope power of the OFDM signal can be restated as p x (t) =A 0 (x)+ A l (x)e jπl ft. () l =1 The average power of the OFDM signal is A 0 (x), which is the same as the power of the codeword x (by Parseval equation) and is denoted by P x. The maximum possible value for PAPR in an OFDM system is equal to the number of subchannels, N. Definition 3: Two N-valued complex sequences x and y are called Golay Complementary Pairs (GCP) if A l (x)+a l (y) =0 l 0. We show this by x y. Each of the sequences x and y is called a Golay Complementary Sequence (GCS). Assume that the sequences x and y are GCP and have the same power (A 0 (x) =A 0 (y)). The instantaneous envelope power is non-negative at all times, therefore PAPR(x) max t{p x (t)} =3dB. (3) P x Consequently, if we choose the codewords from a set of Golay sequences, the PAPR is bounded up to 3dB. Drawing the elements of the codeword from an equalenergy constellations, Davis and Jedwab [6] proved that each of the m! cosets of the first order Reed-Muller code [7], RM h(1,m), having a coset representation of the form h 1m 1 x π(k) x π(k+1) comprises h(m+1) Golay sequences over Z h of length m, where π is a permutation of the symbols {1,,..., m} and h>1.this generates m! h(m+1) Golay sequences of length m. Encoding this code can be done by a very simple digital counter, and its decoding can be done very efficiently by using Sylvester-Hadamard transformation [7]. They also introduced a construction for building at h(m+) m! least Golay complementary pairs over Z h of length m. III. PAPR REDUCTION FOR THE NON-EQUAL ENERGY CONSTELLATION Given the length of each codeword, minimum Euclidian distance, and maximum PAPR, Tarokh and Paterson [8] found a lower bound for achievable coding rate. On the other hand, given the length of each codeword, coding rate and minimum Euclidian distance, they found a lower bound for the PAPR. The lower bound for the PAPR increases by increasing the coding rate. The need for low PAPR and at the same time overcoming the lower bound of rate for equal-power codes has motivated us to investigate the non-equal power codes that achieve low PAPR. To do this we define a special case of GCSs. Definition 4: Two N-valued complex sequences x and y are called Super Golay Complementary Pairs (SGCP) if they are Golay pairs and P x + P y NP av, when P av is the average power of the constellation. We show this by x y. Each of the sequences x and y is called Super Golay Complementary Sequence (SGCS) For a special case, It has been proved in [10] that if the 16-QAM sequences are realized as a sum of two sequences chosen from an equi-probable set of QPSK codewords, then the mean envelope power of the transmitted OFDM symbol is P av, the average power of the 16-QAM constellation. This fact can be easily generalized to our structures introduced in Section IV. Therefore, by virtue of () and the fact that the instantaneous power of each codeword is always non-negative we can see that the PAPR achieved by any SGCS is bounded up by 3dB. 3388
3 Next, we would like to find a construction method for SGolay codes. If x and y are two N-valued sequences, we show the inverse of x by ˆx, the elementwise conjugate of x by x, the concatenation of x and y by x y, and the interleaving of x and y by x y. Also we show the sequence (x 1, x,x 3,..., ( 1) x N ) by x. The following theorem can be seen very easily from Definition. Theorem 5: The property of being Super Golay complementary pairs is invariant under the following transformations: Reflection w.r.t the origin. Reflection w.r.t both axes. Reflection w.r.t the bisectors of all regions. Rotation of one or both sequences. Theorem 6: If x y then a. x y. b. ˆx ŷ c. x ŷ Proof: If x y then a. The kth member of the sequence x is x k =( 1)k x k, therefore using Definition. A l (x )=( 1) l A l (x). (4) b. The kth member of the sequence ˆx is ˆx k = x k, therefore using Definition. A l (ˆx) = = ˆx i+lˆx i = x N l i 1 x N i 1 x k+lx k =(A l (x)) (5) c Using A l ( x) =A l (x) and (5), the statement is concluded. Theorem 7: If x y then a. x y x y b. x y x y Proof: The items are proved separately: a. It is easy to see that l 1 A l (x y) =A l (x)+a l (y)+ and therefore x iy l 1 i A l (x y)+a l (x y) =(A l (x)+a l (y)) = 0. b. if l =k then A l (x y) =A l/ (x)+a l/ (y) =0. (6) If x y, then x y, and since A l ( x) = A l (x), then A l (x y) =0. Therefore, A l (x y)+a l (x y) =0. If l =k +1, then A l (x y) = l 1 x i y i+ l 1. (7) and therefore A l (x y)+a l (x y) =0. By applying the transformations defined in Theorems 5 and 6 to the statements of Theorem 7, we can build a set of structures that create N-valued Super Golay pairs from N-valued ones. Specifically, if x y, each with size N, then the following sequences are Super Golay pairs ([j] means multiplying the sequence by j is optional) : 1) ± [j](x y) ±[j](x y) ) ± [j](x y) ±[j](x y) 3) ± [j](x y) ±[j](ŷ ˆx ) 4) ± [j](x y) ±[j](ŷ ˆx ) 5) ± [j](x y) ±[j](ŷ ˆx ) However, because of the special structure of 16-QAM constellation, many of these constructions yield similar sequences. For example reversing the role of x and y will not yield new pairs. If the number of N-valued pairs is M, the first structure yields 4M of N-valued SGolay pairs and this is true for the second structure too. We have performed a simulation for the pairs with size 8 and obtained the same result. In general each pair with size N yields 3 pairs each with size N. Thisis similar to the Reed-Muller codes used for equal-power Golay sequences. Reed-Muller codes of degree r +1 and length m+1 can be constructed from two m -length Reed-Muller codes, one in degree r and one in degree r +1. IV. SGOLAY 16QAM PAIRS FROM QPSK PAIRS In this section we will look at an important question which is how to start the recursive construction. To this end, we will use the relation that Tarokh and Rößing [10] used. They represented a 16-QAM symbol by a weighted sum of two QPSK symbols. We will generalize their observation and find a construction that builds 16- QAM SGolay sequences from QPSK Golay sequences. Let s define QPSK symbols as the set QP SK = {exp[j( kπ + π 4 )], k Z h} Using Definitions 1 and, the following lemma can be proved easily, Lemma 8: For any two sequences x and y and any two complex numbers α and β A l (αx + βy) = α A l (x)+ β A l (y) + αβ C l (x, y)+α βc l (y, x). 3389
4 Theorem 9: If x and y are N-valued QPSK Golay pairs, and α = β, then each of the following pairs are 16-QAM Super Golay sequences: 1. c = α(x +y) and t = β( x + y). c = α(x y) and t = β(x + y) 3. c = α(x +jy) and t = β(jx + y) 4. c = α(x jy) and t = β( jx + y) Proof: We will prove the result for the third item. The rest can be proved similarly. Using Theorem 8, for each nonzero l, A l (c)+a l (t) =5 α (A l (x)+a l (y)) = 0 Therefore c and t are Golay pairs. It is easy to see that each of these sequences are actually a 16-QAM sequence, when the average power of the constellation is P av =5 α. If we denote the Hermition of x by x H, and consider the fact that the power of both x and y is N, then P c + P t = α ( x +jy + jx + y ) =5 α ( x + y )=10N α =NP av. Therefore, by Definition 4, c and t are Super Golay sequences. Theorem 9 suggests a starting point for the proposed recursive construction. If we limit ourselves to an 16-QAM construction with P av =10, then α and β can be chosen from the set {,,j, j }, and therefore for h(m+) m! each of the Golay complementary pairs over Z h of length m, there are 64 Super Golay 16-QAM pairs. However, some of these pairs are repeated. As an example if (c t), then ( c t) and therefore we do not need to multiply the two sequences in the first construction of Theorem 9 by. Eliminating these repeated sequences, the number of 16-QAM Super Golay pairs generated from each QPSK Golay pair is 4+h(m+) m! 16. Therefore we can build distinct QAM Super Golay pairs over Z h of length m.form = and QPSK symbols (h =), this translates to 4096 pairs. Through exhaustive search, we have found that there are exactly 103 Super Golay pairs and Theorem 9 builds 4096 of them. We were able to come up with some structures that build in average 3 new N-valued SGolay pairs from one N-valued SGolay pair. Therefore, starting from 4- valued codes, our construction is able to achieve at least R = log N/4. (8) 4N code rate for N OFDM subchannels. For 18 subchannels, this achieves 7.3% code rate. Although not still acceptable, this is about 11% improvement over Tarokh-Chong s work [9]. The achievable code rate is about 0% below the equal power Golay codes constructed by Jedwab and Davis [6]. However, because of using 16-QAM constellation, the information rate achieved by these structures is twice as the information rate achieved by Jedwab s construction, while the error correction properties of the code is maintained. The structure we proposed is for general Super Golay codes, regardless of the constellation. However, we have focused on 16-QAM constellation for the sake of simulation. This scheme can be generalized to higher order QAM constellations, like 64-QAM which is used in IEEE WLAN standards like IEEE80.11a. To find a construction method for low PAPR 64-QAM sequences we can use the concept of Golay sets. They are defined as a set of sequences whose autocorrelations with any nonzero replacement add up to zero and therefore their PAPR is bounded up by the size of the set, if they are taken from an equal energy constellation. Paterson has shown that [11] the k+1 -size equal power Golay set can be represented by some certain cosets of RM h(1,m) in RM h(,m). The following lemma which can be proved easily using the Definitions 1 and is a generalization of Lemma 8. Lemma 10: For any n sequences x i and any n complex numbers α i, i =1,...n n n n n A l ( α i x i )= α i A l (x i )+ α i αj C l (x i,x j ). i=1 i=1 i=1 j=1 i j Using this Lemma, the following theorem can be used to generate 64-QAM Super Golay sets (The sum of the powers is nnp av ). By generalizing Lemma 8, the following theorem can be proved to generate 64-QAM Super Golay sets: Theorem 11: If {x i i = 1...4} comprises a N- valued QPSK Golay set, and α i is constant for all i = 1,...4, then the following is a 64-QAM Super Golay set and therefore, the PAPR of each element is at most 4(6dB): {α 1 (4x 1 + jx jx 3 x 4 ), α (4x + jx 1 x 3 jx 4 ), α 3 (4x 3 jx 1 + x jx 4 ), α 4 (4x 4 + x 1 jx jx 3 )}. Note that, for the super Golay sets, the sum of the powers is not NP av anymore, but it is nnp av, when n is the number of sequences comprising a Golay set. V. SIMULATION We have performed a search to find all of QPSK Golay pairs and 16-QAM SGolay pairs of size 4. The total number of QPSK Golay pairs is 56 which is exactly (m+) m! compliant by the formula given in [6] ( distinct QPSK Golay pairs with size 4). Using the representations in Theorem 9, We have been able to build
5 Scheme size 4 SGPs size 8 SGPs built by Theorem TABLE I NUMBER OF CONSTRUCTED 8-VALUED SGOLAY PAIRS. Scheme Max PMEPR Code rate Information rate Recursive1 3dB Recursive 3dB Jedwab1 3dB Jedwab 6dB Paterson 6dB Chong1 3dB Chong 5.56dB TABLE II RATES AND PMEPRS FORSIZE16. SGolay pairs with size 4. The total number of 4-valued SGolay pairs is 103. Table I compares the number of 8-valued SGolay pairs obtained from these two sets. In both cases, each Golay pair with size 4 yields 3 new SGolay pairs with size 8. In this table, scheme 1 means the total number of SGolay pairs and scheme means the number of SGolay pairs built by Theorem 9. Table II and III compare the code rate, information rate and the achievable PMEPR of the proposed recursive structure with the same values reported in [6], [11], and [9] using QPSK constellation for 16 and 3 subcarriers. In the rows represented by Jedwab1 the second order Reed- Muller cosets of the form h 1m 1 x π(k) x π(k+1) are used and therefore the constructed codewords are Golay and their PMEPR is bounded up by 3dB. However, in the scheme represented by Jedwab other forms of second order Reed-Muller cosets are also allowed. This causes the PMEPR of the codeword to exceed 3dB. At the row represented by Paterson, the concept of Golay sets are used. It is proved in [11] that a Golay set of size k+1 achieve the maximum PMEPR of k+1.therows represented by Recursive1 is using the 4-valued 16- QAM SGolay pairs generated from QPSK pairs as the seed, while Recursive scheme uses the total 4-valued 16-QAM codes generated by exhaustive search, as the seed. VI. CONCLUSION AND FUTURE WORK In this paper we focused on the construction of a recursive scheme that allows us to build all of the Super Golay sequences with a specific size. We formed some structures to obtain this code from Super Golay sequences with half size. One of the future directions of this work is to search for more structures. The more structure we obtain, the bigger number of SGolay codes we can cover and the higher coding rate we can achieve. Scheme PMEPR Code rate Information rate Recursive1 3dB Recursive 3dB Jedwab1 3dB Jedwab 6dB Paterson 6dB Chong1 3dB Chong 5.56dB TABLE III RATES AND PMEPRS FORSIZE3 The construction started from QPSK Golay sequences which are efficiently created using nd order cosets of RM h(1,m). Although the information rate is higher than the existing works in this context, it is not still an acceptable rate. Another future direction of this work is to find the possible trade-off between the coding rate and PAPR. The structure we propose is for general Super Golay codes, regardless of the constellation. We also presented a scheme that generates 64-QAM sequences with PAPR bounded up by 4. A natural future direction of this work we aim to do is to find an encoding and decoding method and also analyze the Euclidian distance structure of the construction. REFERENCES [1] R. van Nee, OFDM codes for peak-to average power reduction and error correction, Proc. of IEEE Globecom 96, pp , [] X. Li and L. J. Cimini, Effects of clipping and filtering on the performance of OFDM, Proc. of IEEE Vehicular. Tech. Conf., pp , May [3] A. E. Jones, T. A. Wilkinson, and S. K. Barton, Block coding scheme for reduction of peak to mean envelope power ratio of multicarrier transmission scheme, Electronic Lett., vol. 47, no. 5, pp , Dec [4] A. E. Jones and T. A. Wilkinson, Combined coding for error control and increased robustness to system nonlinearties in OFDM, IEEE 46th Vehicular technology Conf., Atlanta, GA, pp , Apr/May [5] M. J. E. Golay, Complementary series, IRE Trans. On Information Theory, pp. 8 87, Apr [6] J. A. Davis and J. Jedwab, Peak-to-mean power control in OFDM, Golay complementary sequences, and Reed-Muller codes. IEEE Trans. On Information Theory, vol. 45, pp , Nov [7] S. B. Wicker, Error control systems for digital communication and storage. Prentice Hall, New Jersey, [8] K. G. Paterson and V. Tarokh, On the existence and construction of good codes with low peak-to-average power ratios, IEEE Trans. on Information Theory, vol. 46, pp , 000. [9] C. V. Chong and V. Tarokh, Two constructions of 16-QAM Golay Complementary Sequences, vahid. [10] C. Rößing and V. Tarokh, A construction of OFDM 16-QAM sequences having low peak powers, IEEE Trans. On Information Theory, vol. 47, no. 5, pp , Jul [11] K. G. Paterson, Generalized Reed-Muller codes and power control in OFDM modulation, IEEE Trans. On Comm., vol. 46, no. 1, pp , Jan
Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for OFDM System
Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for OFDM System Gurpreet Singh Walia*, Charanjit Singh** *(University College of Engineering, Punjabi University, Patiala, India) **
More informationInterleaved PC-OFDM to reduce the peak-to-average power ratio
1 Interleaved PC-OFDM to reduce the peak-to-average power ratio A D S Jayalath and C Tellambura School of Computer Science and Software Engineering Monash University, Clayton, VIC, 3800 e-mail:jayalath@cssemonasheduau
More informationOn the Peak-to-Average Power of OFDM Signals Based on Oversampling
7 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL 51, NO 1, JANUARY 003 On the Peak-to-Average Power of OFDM Signals Based on Oversampling Masoud Sharif, Student Member, IEEE, Mohammad Gharavi-Alkhansari, Member,
More informationORTHOGONAL frequency division multiplexing (OFDM)
IEEE TRANSACTIONS ON BROADCASTING, VOL. 50, NO. 3, SEPTEMBER 2004 335 Modified Selected Mapping Technique for PAPR Reduction of Coded OFDM Signal Seung Hee Han, Student Member, IEEE, and Jae Hong Lee,
More informationAlgorithm to Improve the Performance of OFDM based WLAN Systems
International Journal of Computer Science & Communication Vol. 1, No. 2, July-December 2010, pp. 27-31 Algorithm to Improve the Performance of OFDM based WLAN Systems D. Sreenivasa Rao 1, M. Kanti Kiran
More informationPeak-to-Average Power Ratio (PAPR)
Peak-to-Average Power Ratio (PAPR) Wireless Information Transmission System Lab Institute of Communications Engineering National Sun Yat-sen University 2011/07/30 王森弘 Multi-carrier systems The complex
More informationIJMIE Volume 2, Issue 4 ISSN:
Reducing PAPR using PTS Technique having standard array in OFDM Deepak Verma* Vijay Kumar Anand* Ashok Kumar* Abstract: Orthogonal frequency division multiplexing is an attractive technique for modern
More informationAnju 1, Amit Ahlawat 2
Orthogonal Frequency Division Multiplexing Anju 1, Amit Ahlawat 2 1 Hindu College of Engineering, Sonepat 2 Shri Baba Mastnath Engineering College Rohtak Abstract: OFDM was introduced in the 1950s but
More informationReducing Intercarrier Interference in OFDM Systems by Partial Transmit Sequence and Selected Mapping
Reducing Intercarrier Interference in OFDM Systems by Partial Transmit Sequence and Selected Mapping K.Sathananthan and C. Tellambura SCSSE, Faculty of Information Technology Monash University, Clayton
More informationEstimation Techniques for CFO
Estimation Techniques for CFO Anju 1, Amit Ahlawat 2 1 Hindu College of Engineering, Sonepat 2 Shri Baba Mastnath Engineering College Rohtak Abstract: Orthogonal frequency division multiplexing (OFDM)
More informationSimplified Levenberg-Marquardt Algorithm based PAPR Reduction for OFDM System with Neural Network
Simplified Levenberg-Marquardt Algorithm based PAPR Reduction for OFDM System with Neural Network Rahul V R M Tech Communication Department of Electronics and Communication BCCaarmel Engineering College,
More informationPower Reduction in OFDM systems using Tone Reservation with Customized Convex Optimization
Power Reduction in OFDM systems using Tone Reservation with Customized Convex Optimization NANDALAL.V, KIRUTHIKA.V Electronics and Communication Engineering Anna University Sri Krishna College of Engineering
More informationPerformance analysis of OFDM with QPSK using AWGN and Rayleigh Fading Channel
Performance analysis of OFDM with QPSK using AWGN and Rayleigh Fading Channel 1 V.R.Prakash* (A.P) Department of ECE Hindustan university Chennai 2 P.Kumaraguru**(A.P) Department of ECE Hindustan university
More informationPAPR Reduction of OFDM System using LBC
PAPR Reduction of OFDM System using LBC Kushnure DT PG Student Kamthane AN Professor Ghanwat VP Assistant Professor ABSTRACT In this paper, we propose an efficient scheme to reduce the peak-to-average
More informationA Novel of Low Complexity Detection in OFDM System by Combining SLM Technique and Clipping and Scaling Method Jayamol Joseph, Subin Suresh
A Novel of Low Complexity Detection in OFDM System by Combining SLM Technique and Clipping and Scaling Method Jayamol Joseph, Subin Suresh Abstract In order to increase the bandwidth efficiency and receiver
More informationRiemann Sequence based SLM with nonlinear effects of HPA
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, Volume 10, Issue 6 Ver. I (Nov Dec. 2015), PP 74-80 www.iosrjournals.org Riemann Sequence based SLM
More informationPTS Technique for MIMO-OFDM Paper Reduction
PTS Technique for MIMO-OFDM Paper Reduction Chirag V Trivedi 1, Anil K Sisodia 2, Kiran R Parmar 3 2 L.J.institute of technology, Ahmedabad, India 3 Government Engineering College, Gandhinagar, India Abstract
More informationORTHOGONAL frequency division multiplexing (OFDM)
IEEE TRANSACTIONS ON BROADCASTING, VOL. 52, NO. 1, MARCH 2006 77 A New PTS OFDM Scheme with Low Complexity for PAPR Reduction Dae-Woon Lim, Seok-Joong Heo, Jong-Seon No, and Habong Chung, Member, IEEE
More informationPAPR REDUCTION TECHNIQUE USING MODIFIED SLM IN OFDM SYSTEM
PAPR REDUCTION TECHNIQUE USING MODIFIED SLM IN OFDM SYSTEM Mukul Dr. Sajjan Singh M. Tech Research Scholar, Department of ECE, Associate Professor, Department of ECE BRCM CET, Bahal, Bhiwani, India BRCM
More informationNear Shannon Limit and Reduced Peak to Average Power Ratio Channel Coded OFDM
Near Shannon Limit and Reduced Peak to Average Power Ratio Channel Coded OFDM The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters
More informationImplementation and Comparative analysis of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Rashmi Choudhary
Implementation and Comparative analysis of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Rashmi Choudhary M.Tech Scholar, ECE Department,SKIT, Jaipur, Abstract Orthogonal Frequency Division
More informationReduction of peak to average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) system
Quest Journals Journal of Electronics and Communication Engineering Research Volume 2 ~ Issue 3 (2014) pp: 01-06 ISSN(Online) : 2321-5941 www.questjournals.org Research Paper Reduction of peak to average
More informationA New PAPR Reduction in OFDM Systems Using SLM and Orthogonal Eigenvector Matrix
A New PAPR Reduction in OFDM Systems Using SLM and Orthogonal Eigenvector Matrix Md. Mahmudul Hasan University of Information Technology & Sciences, Dhaka Abstract OFDM is an attractive modulation technique
More informationHigher Order Rotation Spreading Matrix for Block Spread OFDM
University of Wollongong Research Online Faculty of Informatics - Papers (Archive) Faculty of Engineering and Information Sciences 27 Higher Order Rotation Spreading Matrix for Block Spread OFDM Ibrahim
More informationComputational Complexity Reduction of OFDM Signals by PTS with Various PAPR Conventional Methods
ISSN (O): 2349-7084 International Journal of Computer Engineering In Research Trends Computational Complexity Reduction of OFDM Signals by PTS with Various PAPR Conventional Methods BANOTHU RAMESH (1),
More informationProbability of Error Calculation of OFDM Systems With Frequency Offset
1884 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 49, NO. 11, NOVEMBER 2001 Probability of Error Calculation of OFDM Systems With Frequency Offset K. Sathananthan and C. Tellambura Abstract Orthogonal frequency-division
More informationKeywords: MC-CDMA, PAPR, Partial Transmit Sequence, Complementary Cumulative Distribution Function.
ol. 2, Issue4, July-August 2012, pp.1192-1196 PAPR Reduction of an MC-CDMA System through PTS Technique using Suboptimal Combination Algorithm Gagandeep Kaur 1, Rajbir Kaur 2 Student 1, University College
More informationORTHOGONAL frequency division multiplexing
IEEE TRANSACTIONS ON COMMUNICATIONS, VOL 56, NO 1, JANUARY 2008 27 Construction of Block Orthogonal Golay Sequences and Application to Channel Estimation of MIMO-OFDM Systems Oh-Soon Shin, H T Kung, and
More informationOptical Power Reduction for Multiple-Subcarrier Modulated Indoor Wireless Optical Channels
Optical Power Reduction for Multiple-Subcarrier Modulated Indoor Wireless Optical Channels Weiwei Kang and Steve Hranilovic Department of Electrical and Computer Engineering, McMaster University Hamilton,
More informationMULTIPATH fading could severely degrade the performance
1986 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 53, NO. 12, DECEMBER 2005 Rate-One Space Time Block Codes With Full Diversity Liang Xian and Huaping Liu, Member, IEEE Abstract Orthogonal space time block
More informationSystematic Comparison of Different PAPR Reduction Methods in OFDM Systems
International Journal of Electronics and Communication Engineering. ISSN 0974-2166 Volume 7, Number 1 (2014), pp. 21-30 International Research Publication House http://www.irphouse.com Systematic Comparison
More informationThis chapter describes the objective of research work which is covered in the first
4.1 INTRODUCTION: This chapter describes the objective of research work which is covered in the first chapter. The chapter is divided into two sections. The first section evaluates PAPR reduction for basic
More informationLow Complexity Partial SLM Technique for PAPR Reduction in OFDM Transmitters
International Journal on Electrical Engineering and Informatics - Volume 5, Number 1, March 2013 Low Complexity Partial SLM Technique for PAPR Reduction in OFDM Transmitters Ibrahim Mohammad Hussain Department
More informationPeak to Average Power Ratio Reduction of Orthogonal Frequency Division Multiplexing System with a Significant Low Complexity
American Journal of Applied Sciences, 0, 9 (), 985-989 ISS: 546-939 0 Science Publication doi:0.3844/ajassp.0.985.989 Published Online 9 () 0 (http://www.thescipub.com/ajas.toc) Peak to Average Power Ratio
More informationPAPR analysis in Wavelet Packet Modulation
PAPR analysis in Wavelet Packet Modulation Matthieu Gautier, Christian Lereau, Marylin Arndt France Telecom R&D 28, chemin du vieux chêne 38243 Meylan - FRANCE Joël Lienard GIPSA-Lab 961 rue de Houille
More informationPERFORMANCE ANALYSIS OF DIFFERENT M-ARY MODULATION TECHNIQUES IN FADING CHANNELS USING DIFFERENT DIVERSITY
PERFORMANCE ANALYSIS OF DIFFERENT M-ARY MODULATION TECHNIQUES IN FADING CHANNELS USING DIFFERENT DIVERSITY 1 MOHAMMAD RIAZ AHMED, 1 MD.RUMEN AHMED, 1 MD.RUHUL AMIN ROBIN, 1 MD.ASADUZZAMAN, 2 MD.MAHBUB
More informationPartial Transmit Sequence Using EVM Optimization Metric for BER Reduction in OFDM Systems
2013 8th International Conference on Communications and etworking in China (CHIACOM) Partial Transmit Sequence Using EVM Optimization Metric for BER Reduction in OFDM Systems Shun Zhang, Jianhua Ge, Jun
More informationReduction of PAPR of OFDM Using Exponential Companding Technique with Network Coding
Reduction of PAPR of OFDM Using Exponential Companding Technique with Network Coding Miss. Sujata P. Jogdand 1, Proff. S.L.Kotgire 2 1 (Dept. of Electronics & Telecommunication, M.G.M s college of Engg./S.R.T.M.
More informationThe Optimal Employment of CSI in COFDM-Based Receivers
The Optimal Employment of CSI in COFDM-Based Receivers Akram J. Awad, Timothy O Farrell School of Electronic & Electrical Engineering, University of Leeds, UK eenajma@leeds.ac.uk Abstract: This paper investigates
More informationCRITERIA FOR SELECTION OF PAPR REDUCTION TECHNIQUES IN OFDM SYSTEM
CRITERIA FOR SELECTION OF PAPR REDUCTION TECHNIQUES IN OFDM SYSTEM Varadharaju G. #1,Mohanraj V. *2,S. Sunil Kumar *3 and Dr. P. N.Neelakantan Ph.D. *4 #1,*2,*3 PG Scholars, Applied Electronics, Akshaya
More informationReduction of PAPR and BER by Using Golay Sequences for OFDM System
International Journal of Emerging Engineering Research and Technology Volume 2, Issue 7, October 2014, PP 191-198 ISSN 2349-4395 (Print) & ISSN 2349-4409 (Online) Reduction of PAPR and BER by Using Golay
More informationLow-Complexity Architecture for PAPR Reduction in OFDM Systems with Near-Optimal Performance
Low-Complexity Architecture for PAPR Reduction in OFDM Systems with Near-Optimal Performance 1 S Jyothirmayee, Associate professor, Email Id: jyocol2011@gmail.com 2 Y Sivaramakrishna, Assistant professor,
More informationPAPR Reduction in SLM Scheme using Exhaustive Search Method
Available online www.ejaet.com European Journal of Advances in Engineering and Technology, 2017, 4(10): 739-743 Research Article ISSN: 2394-658X PAPR Reduction in SLM Scheme using Exhaustive Search Method
More informationMC CDMA PAPR Reduction Using Discrete Logarithmic Method
International Journal of Engineering Research and Development ISSN: 2278-067X, Volume 1, Issue 4 (June 2012), PP.38-43 www.ijerd.com MC CDMA PAPR Reduction Using Discrete Logarithmic Method B.Sarala 1,
More informationImproved concatenated (RS-CC) for OFDM systems
Improved concatenated (RS-CC) for OFDM systems Mustafa Dh. Hassib 1a), JS Mandeep 1b), Mardina Abdullah 1c), Mahamod Ismail 1d), Rosdiadee Nordin 1e), and MT Islam 2f) 1 Department of Electrical, Electronics,
More informationCombination of Space-Time Block Coding with MC-CDMA Technique for MIMO systems with two, three and four transmit antennas
Combination of Space-Time Block Coding with MC-CDMA Technique for MIMO systems with two, three and four transmit antennas V. Le Nir (1), J.M. Auffray (2), M. Hélard (1), J.F. Hélard (2), R. Le Gouable
More informationStudy of Turbo Coded OFDM over Fading Channel
International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 3, Issue 2 (August 2012), PP. 54-58 Study of Turbo Coded OFDM over Fading Channel
More informationMULTICARRIER communication systems are promising
1658 IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 52, NO. 10, OCTOBER 2004 Transmit Power Allocation for BER Performance Improvement in Multicarrier Systems Chang Soon Park, Student Member, IEEE, and Kwang
More informationPERFORMANCE ANALYSIS OF PARTIAL RANSMIT SEQUENCE USING FOR PAPR REDUCTION IN OFDM SYSTEMS
PERFORMANCE ANALYSIS OF PARTIAL RANSMIT SEQUENCE USING FOR PAPR REDUCTION IN OFDM SYSTEMS *A.Subaitha Jannath, **C.Amarsingh Feroz *PG Scholar, Department of Electronics and Communication Engineering,
More informationLow Complexity PAPR Reduction Technique for Coded OFDM Systems with Scrambling Approach
Research Article International Journal of Current Engineering and Technology ISSN 77-4106 014 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Low Complexity PAPR Reduction
More information2836 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 52, NO. 10, OCTOBER Masoud Sharif, Student Member, IEEE, and Babak Hassibi
2836 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 52, NO. 10, OCTOBER 2004 Existence of Codes With Constant PMEPR and Related Design Masoud Sharif, Student Member, IEEE, and Babak Hassibi Abstract Recently,
More informationNonlinear Companding Transform Algorithm for Suppression of PAPR in OFDM Systems
Nonlinear Companding Transform Algorithm for Suppression of PAPR in OFDM Systems P. Guru Vamsikrishna Reddy 1, Dr. C. Subhas 2 1 Student, Department of ECE, Sree Vidyanikethan Engineering College, Andhra
More informationPAPR Reduction in OFDM System using Adapting Coding Technique with Pre distortion Method
PAPR Reduction in OFDM System using Adapting Coding Technique with Pre distortion Method CHHAVI SHARMA 1, SHIV KUMAR TOMAR, A.K.GUPTA 3 MJP Rohilkhand University, Bareilly, India 1 Maya Institute of Technology
More informationPAPR Reduction in an OFDM system using Recursive Clipping and Filtering Technique
PAPR Reduction in an OFDM system using Recursive Clipping and Filtering Technique Md. ANAMUL ISLAM 1, N. AHMED 2*, NIZAM UDDIN AHAMED 3, MATIUR RAHMAN 4 S. A. Aljunid 2 1 Dept. of Applied Physics and Electronic
More informationPAPR REDUCTION OF OFDM SIGNALS USING SELECTIVE MAPPING WITH TURBO CODES
PAPR REDUCTION OF OFDM SIGNALS USING SELECTIVE MAPPING WITH TURBO CODES Pawan Sharma 1 and Seema Verma 2 1 Department of Electronics and Communication Engineering, Bhagwan Parshuram Institute of Technology,
More informationPacket Permutation PAPR Reduction for OFDM Systems Based on Luby Transform Codes
Journal of Computer and Communications, 2018, 6, 219-228 http://www.scirp.org/journal/jcc ISSN Online: 2327-5227 ISSN Print: 2327-5219 Packet Permutation PAPR Reduction for OFDM Systems Based on Luby Transform
More informationReduction of PAPR in OFDM System by Using Weighted Method
Reduction of PAPR in OFDM System by Using Weighted Method K.Anil Kumar, M.Tech Assistant Professor, Department of ECE, G.Pullaiah College of Engineering and Technology, Kurnool. Abstract: In this paper,
More informationInternational Journal of Research and Review E-ISSN: ; P-ISSN:
International Journal of Research and Review www.ijrrjournal.com E-ISSN: 2349-9788; P-ISSN: 2454-2237 Research Paper An Improvement of Scrambling Technique by Using Modified Selected Mapping in W.A.F.W.
More informationREDUCING PAPR OF OFDM BASED WIRELESS SYSTEMS USING COMPANDING WITH CONVOLUTIONAL CODES
REDUCING PAPR OF OFDM BASED WIRELESS SYSTEMS USING COMPANDING WITH CONVOLUTIONAL CODES Pawan Sharma 1 and Seema Verma 2 1 Department of Electronics and Communication Engineering, Bhagwan Parshuram Institute
More informationAn Overview of PAPR Reduction Techniques in OFDM Systems
An Overview of PAPR Reduction Techniques in OFDM Systems Md. Mahmudul Hasan Electronics and Communication Engineering UITS, Dhaka-1212, Bangladesh S. S. Singh, PhD. School of Electronics Engineering KIIT
More informationUNIFIED DIGITAL AUDIO AND DIGITAL VIDEO BROADCASTING SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM
UNIFIED DIGITAL AUDIO AND DIGITAL VIDEO BROADCASTING SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM 1 Drakshayini M N, 2 Dr. Arun Vikas Singh 1 drakshayini@tjohngroup.com, 2 arunsingh@tjohngroup.com
More informationPartial Transmit Sequence (PTS)-PAPR Reduction Technique in OFDM Systems with Reduced Complexity. II. PAPR problem in OFDM system
Conference on Advances in Communication and Control Systems 2013 (CAC2S 2013) Partial Transmit Sequence (PTS)-PAPR Reduction Technique in OFDM Systems with Reduced Complexity 1 ikhil Arora (nikhilarora.geu@gmail.com)
More informationCORRELATION BASED SNR ESTIMATION IN OFDM SYSTEM
CORRELATION BASED SNR ESTIMATION IN OFDM SYSTEM Suneetha Kokkirigadda 1 & Asst.Prof.K.Vasu Babu 2 1.ECE, Vasireddy Venkatadri Institute of Technology,Namburu,A.P,India 2.ECE, Vasireddy Venkatadri Institute
More informationSINCE orthogonal frequency division multiplexing
IEEE TRANSACTIONS ON BROADCASTING, VOL. 55, NO. 3, SEPTEMBER 2009 679 Bit-Based SLM Schemes for PAPR Reduction in QAM Modulated OFDM Signals Hyun-Bae Jeon, Kyu-Hong Kim, Jong-Seon No, Member, IEEE, and
More information2. PAPR IN OFDM: Let X=[XR0R,X1,XR2R,..XRMR] is data coming out of S/P. OFDM is represented in time domain by
IJISET - International Journal of Innovative Science, Engineering & Technology, Vol. Issue 4, June 4. Optimization of AR in Orthogonal Frequency Division Multiplexing 3 4 5. Raga Lavima, Routhula. Tulasi,
More informationSPREADING SEQUENCES SELECTION FOR UPLINK AND DOWNLINK MC-CDMA SYSTEMS
SPREADING SEQUENCES SELECTION FOR UPLINK AND DOWNLINK MC-CDMA SYSTEMS S. NOBILET, J-F. HELARD, D. MOTTIER INSA/ LCST avenue des Buttes de Coësmes, RENNES FRANCE Mitsubishi Electric ITE 8 avenue des Buttes
More informationA Kalman Filter Approach to Reduce ICI in OFDM Systems
A Kalman Filter Approach to Reduce ICI in OFDM Systems Pardeep 1, Sajjan Singh 2, S. V. A. V. Prasad 3 1 M.Tech Scholar, Department of ECE, BRCM CET, Bahal, Bhiwani, India e-mail: ps58519@gmail.com 2 Assistant
More informationInternational Journal of Innovative Research in Advanced Engineering (IJIRAE) ISSN: Issue 06, Volume 3 (June 2016)
COMPARATIVE STUDY OF PAPR REDUCTION ON SPECTRUM AND ENERGY EFFICIENCIES USING CLIPPING AND FILTERING TECHNIQUE AND PARTIAL TRANSMIT SEQUENCE TECHNIQUE IN OFDM SYSTEM Shashiranjan roy Manav Rachna international
More informationNew Techniques to Suppress the Sidelobes in OFDM System to Design a Successful Overlay System
Bahria University Journal of Information & Communication Technology Vol. 1, Issue 1, December 2008 New Techniques to Suppress the Sidelobes in OFDM System to Design a Successful Overlay System Saleem Ahmed,
More informationarxiv: v1 [cs.it] 21 Sep 2012
arxiv:1209.4811v1 [cs.it] 21 Sep 2012 Performance Analysis of Error Control Coding Techniques for Peak-to-Average Power Ratio Reduction of Multicarrier Signals Sanjay Singh M.Sathish Kumar and H.S Mruthyunjaya
More informationCOMPARISON OF SLM & PTS TECHNIQUES FOR REDUCING PAPR IN OFDM
COMPARISON OF SLM & PTS TECHNIQUES FOR REDUCING PAPR IN OFDM Bala Bhagya Sree.Ch 1, Aruna Kumari.S 2 1 Department of ECE, Mallareddy college of Engineering& Technology, Hyderabad, India 2 Associate Professor
More informationIJREAT International Journal of Research in Engineering & Advanced Technology, Volume 1, Issue 5, Oct-Nov, 2013 ISSN:
PAPR Reduction of OFDM Signal by Novel PTS Using Recursive Phase Correlation Factor with Low Computational Complexity S.Bhoopalan 1, J.Elakkiya 2 and S.Sasikala 3 1 Assistant Professor, Department of ECE,
More informationLow Complexity PAPR Reduction Technique for Coded OFDM Systems with Scrambling Approach
Research Article International Journal of Current Engineering and Technology ISSN 77-4106 014 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Low Complexity PAPR Reduction
More informationModified Selected Mapping Technique for Peak-to-Average Power Ratio Reduction in Orthogonal Frequency Division Multiplexing Systems
International Journal of Current Engineering and Technology E-ISSN 2277 4106, P-ISSN 2347 5161 2017 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article Modified
More informationClipping and Filtering Technique for reducing PAPR In OFDM
IOSR Journal of Engineering (IOSRJEN) e-issn: 2250-3021, p-issn: 2278-8719, Volume 2, Issue 9 (September 2012), PP 91-97 Clipping and Filtering Technique for reducing PAPR In OFDM Saleh Albdran 1, Ahmed
More informationLecture 3: Wireless Physical Layer: Modulation Techniques. Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday
Lecture 3: Wireless Physical Layer: Modulation Techniques Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday Modulation We saw a simple example of amplitude modulation in the last lecture Modulation how
More informationA COMPARISON OF DIFFERENT PAPR REDUCTION TECHNIQUES IN OFDM USING VARIOUS MODULATIONS
A COMPARISON OF DIFFERENT PAPR REDUCTION TECHNIQUES IN OFDM USING VARIOUS MODULATIONS Gaurav Sikri 1 and Rajni 2 1 Lala Lajpat Rai Institute of Engineering & Technology, Moga, Punjab, India er.gaurav19@gmail.com
More informationIEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 51, NO. 1, JANUARY
IEEE TRANSACTIONS ON INFORMATION THEORY, VOL 51, NO 1, JANUARY 2005 229 Full-Rate Full-Diversity Space Frequency Codes With Optimum Coding Advantage Weifeng Su, Member, IEEE, Zoltan Safar, Member, IEEE,
More informationHigh Performance Phase Rotated Spreading Codes for MC-CDMA
2016 International Conference on Computing, Networking and Communications (ICNC), Workshop on Computing, Networking and Communications (CNC) High Performance Phase Rotated Spreading Codes for MC-CDMA Zhiping
More informationPerformance Evaluation of different α value for OFDM System
Performance Evaluation of different α value for OFDM System Dr. K.Elangovan Dept. of Computer Science & Engineering Bharathidasan University richirappalli Abstract: Orthogonal Frequency Division Multiplexing
More informationAn Overview of PAPR Reduction Techniques In Concerned with OFDM
An Overview of PAPR Reduction Techniques In Concerned with OFDM Prof. Kailas Prof.Sharan Gowda Prof.Annarao Mr.Ramchandrappa Assistant Professor Assistant Professor Assistant Professor M.Tech Scholar E&CE
More informationPAPR Reduction techniques in OFDM System Using Clipping & Filtering and Selective Mapping Methods
PAPR Reduction techniques in OFDM System Using Clipping & Filtering and Selective Mapping Methods Okello Kenneth 1, Professor Usha Neelakanta 2 1 P.G. Student, Department of Electronics & Telecommunication
More informationPerformance Study of MIMO-OFDM System in Rayleigh Fading Channel with QO-STB Coding Technique
e-issn 2455 1392 Volume 2 Issue 6, June 2016 pp. 190 197 Scientific Journal Impact Factor : 3.468 http://www.ijcter.com Performance Study of MIMO-OFDM System in Rayleigh Fading Channel with QO-STB Coding
More informationTCM-coded OFDM assisted by ANN in Wireless Channels
1 Aradhana Misra & 2 Kandarpa Kumar Sarma Dept. of Electronics and Communication Technology Gauhati University Guwahati-781014. Assam, India Email: aradhana66@yahoo.co.in, kandarpaks@gmail.com Abstract
More informationDCT BASED PARTIAL TRANSMIT SEQUENCE TECHNIQUE FOR PAPR REDUCTION IN OFDM TRANSMISSION
VOL. 10, O. 5, MARCH 015 ISS 1819-6608 ARP Journal of Engineering and Applied Sciences 006-015 Asian Research Publishing etwork (ARP). All rights reserved. DCT BASED PARTIAL TRASMIT SEQUECE TECHIQUE FOR
More informationChapter 2 Overview - 1 -
Chapter 2 Overview Part 1 (last week) Digital Transmission System Frequencies, Spectrum Allocation Radio Propagation and Radio Channels Part 2 (today) Modulation, Coding, Error Correction Part 3 (next
More informationORTHOGONAL frequency division multiplexing
IEEE TRANSACTIONS ON BROADCASTING, VOL. 58, NO. 4, DECEMBER 2012 669 A New Blind SLM Scheme With Low Decoding Complexity for OFDM Systems Hyun-Seung Joo, Seok-Joong Heo, Hyun-Bae Jeon, Jong-Seon No, Fellow,
More information[Gupta, 3(3): March, 2014] ISSN: Impact Factor: 1.852
[Gupta, 3(3): March, 204] ISSN: 2277-9655 Impact Factor:.852 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Peak to Average Power Reduction using Radix-2 Decimation in Frequency
More informationA Comparative Approach between Clipping and Probabilistic Technique for Reducing PAPR of OFDM System
Advance in Electronic and Electric Engineering. ISSN 2231-1297, Volume 3, Number 7 (2013), pp. 779-788 Research India Publications http://www.ripublication.com/aeee.htm A Comparative Approach between Clipping
More informationPhysical-Layer Network Coding Using GF(q) Forward Error Correction Codes
Physical-Layer Network Coding Using GF(q) Forward Error Correction Codes Weimin Liu, Rui Yang, and Philip Pietraski InterDigital Communications, LLC. King of Prussia, PA, and Melville, NY, USA Abstract
More informationTHE COMBINATION OF CLIPPING AND FILTERING WITH SELECTIVE MAPPING METHODS FOR PEAK TO AVERAGE POWER RATIO REDUCTION IN OFDM
24 Acta Electrotechnica et Informatica, Vol. 9, No. 4, 2009, 24 29 THE COMBINATION OF CLIPPING AND FILTERING WITH SELECTIVE MAPPING METHODS FOR PEAK TO AVERAGE POWER RATIO REDUCTION IN OFDM Josef URBAN,
More informationPeak-to-Average Power Ratio Analysis in Multicarrier DS-CDMA
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 52, NO. 3, MAY 2003 561 Peak-to-Average Power Ratio Analysis in Multicarrier DS-CDMA Xi-Kai Zhao and Xian-Da Zhang, Senior Member, IEEE Abstract Multicarrier
More informationPerformance of Wideband Mobile Channel with Perfect Synchronism BPSK vs QPSK DS-CDMA
Performance of Wideband Mobile Channel with Perfect Synchronism BPSK vs QPSK DS-CDMA By Hamed D. AlSharari College of Engineering, Aljouf University, Sakaka, Aljouf 2014, Kingdom of Saudi Arabia, hamed_100@hotmail.com
More informationDEGRADED broadcast channels were first studied by
4296 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL 54, NO 9, SEPTEMBER 2008 Optimal Transmission Strategy Explicit Capacity Region for Broadcast Z Channels Bike Xie, Student Member, IEEE, Miguel Griot,
More informationORTHOGONAL frequency division multiplexing
IEEE COMMUNICATION LETTERS, VOL. XX, NO. XX, XX XX 1 Low-Complexity Null Subcarrier-Assisted OFDM AR Reduction with Improved BER Md Sakir Hossain, Graduate Student Member, IEEE, and Tetsuya Shimamura,
More informationA Linear Programming Approach for PAPR Reduction in OFDM Systems
A Linear Programming Approach for PAPR Reduction in OFDM Systems Yuan-Hao Tung, Kuhn-Chang Lin and Yu T. Su Department of Communications Engineering, National Chiao Tung University Dar-Shei Rd., Hsinchu,
More informationCombined Transmitter Diversity and Multi-Level Modulation Techniques
SETIT 2005 3rd International Conference: Sciences of Electronic, Technologies of Information and Telecommunications March 27 3, 2005 TUNISIA Combined Transmitter Diversity and Multi-Level Modulation Techniques
More informationPerformance Analysis of Maximum Likelihood Detection in a MIMO Antenna System
IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 50, NO. 2, FEBRUARY 2002 187 Performance Analysis of Maximum Likelihood Detection in a MIMO Antenna System Xu Zhu Ross D. Murch, Senior Member, IEEE Abstract In
More informationPAPR Reduction of OFDM Signals using Partial Transmit Sequence and Clipping Hybrid Scheme
PAPR Reduction of OFDM Signals using Partial Transmit Sequence and Clipping Hybrid Scheme Eugen-Victor Cuteanu Communication Department Politehnica University, Faculty of Electronics and Telecommunications
More informationBit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX
Bit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX Amr Shehab Amin 37-20200 Abdelrahman Taha 31-2796 Yahia Mobasher 28-11691 Mohamed Yasser
More information